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Pick up worksheet and be prepared to begin 
filling it out.

Pick up worksheet and be prepared to begin 
filling it out. . Friction is caused by... Friction always acts.... Friction increases as __________________ increases. Friction formula:. atomic forces (atoms interacting) and surface characteristics. . opposing the motion. Normal Force.

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filling it out.

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  1. Pick up worksheet and be prepared to begin 
filling it out. Friction is caused by... Friction always acts.... Friction increases as __________________ increases. Friction formula: atomic forces (atoms interacting) and surface characteristics. opposing the motion. Normal Force Fk,s,F=

  2. 6 & 7.

  3. 8 & 9.

  4. 10 & 11.

  5. Go Volleyball! Beat the Bulldogs! We're all cheering for you! Please grab a calculator if you need one and be prepared to 
review before your quiz begins. There will NOT be after school tutoring today. I will open up 
Wednesday and Thursday instead! Catapults need to go home!!!!!!!!!!!!!!!! We have a lab 
tomorrow! Yay! (You have to say yay in Kermits voice)

  6. Units mass kg acceleration m/s2 Force N Alternate force unit kgm/s2 Contact vs Field force Difference between mass and force Free body diagrams- use 4 forces

  7. Sum of forces = ? when at rest or constant speed. Sum of forces = ? when nonzero, unbalanced.

  8. Newt `

  9. 1st/3rd period bonus question: (Answer on the back of your quiz) We put a closed glass-case with air and a small bird 
inside on a scale. It is obvious that the scale indicates 
the weight of the bird too, when it is sitting on the 
bottom of the case. What is the weight if the bird is 
hovering in the mid-air inside the case? Why?

  10. 2nd/4th Period Bonus Question: (answer on back of quiz) The weight of an air-balloon inflated with air is measured using a very 
sensitive scale. The air is let out from the balloon and the weight of the 
balloon (and of the thread) is measured. What is the result? Why?

  11. 6th Period bonus question: If the gravitational force on the moon is 
one-sixth the gravitational force on earth, 
how fast could a bird fly on the moon if it 
flew about 25 miles per hour on Earth? 
(You can assume the bird has an oxygen 
tank to breathe!)

  12. 7th Period bonus question: We all know that if you weigh yourself on 
the moon, it is less than your weight on 
the Earth. Can you tell me something that 
actually weighs more on the moon than on Earth?

  13. Why is it important to wear your seatbelt? (Think about Newton's first law). http://www.physicsclassroom.com/mmedia/newtlaws/cci.cfm

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